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https://github.com/sigmasternchen/php-doc-en
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9445e8d99a
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@151342 c90b9560-bf6c-de11-be94-00142212c4b1
95 lines
2.8 KiB
XML
95 lines
2.8 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.10 $ -->
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<!-- splitted from ./en/functions/mysql.xml, last change in rev 1.2 -->
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<refentry id="function.mysql-errno">
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<refnamediv>
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<refname>mysql_errno</refname>
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<refpurpose>
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Returns the numerical value of the error message from previous
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MySQL operation
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</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>int</type><methodname>mysql_errno</methodname>
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<methodparam choice="opt"><type>resource</type><parameter>
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link_identifier
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</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns the error number from the last MySQL function, or
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<literal>0</literal> (zero) if no error occurred.
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</para>
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<para>
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Errors coming back from the MySQL database backend no longer
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issue warnings. Instead, use <function>mysql_errno</function> to
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retrieve the error code. Note that this function only returns the
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error code from the most recently executed MySQL function (not
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including <function>mysql_error</function> and
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<function>mysql_errno</function>), so if you want to use it,
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make sure you check the value before calling another MySQL
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function.
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<example>
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<title><function>mysql_errno</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$link = mysql_connect("localhost", "mysql_user", "mysql_password");
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if (!mysql_select_db("nonexistentdb", $link)) {
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echo mysql_errno($link) . ": " . mysql_error($link). "\n";
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}
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mysql_select_db("kossu", $link);
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if (!mysql_query("SELECT * FROM nonexistenttable", $link)) {
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echo mysql_errno($link) . ": " . mysql_error($link) . "\n";
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}
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?>
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]]>
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</programlisting>
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<para>
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The above example would produce the following output:
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</para>
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<screen>
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<![CDATA[
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1049: Unknown database 'nonexistentdb'
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1146: Table 'kossu.nonexistenttable' doesn't exist
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]]>
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</screen>
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</example>
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</para>
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<note>
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<para>
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If the optional argument is specified the given link
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is used to retrieve the error code. If not, the last
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opened link is used.
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</para>
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</note>
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<para>
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See also <function>mysql_error</function> and
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<ulink url="&url.mysql.docs.error;">MySQL error codes</ulink>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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